Fun
Not bad considering. Pretty simple, but I wasn't confused or annoyed ever. The ghost mechanic was neat.
Aesthetics
The art and style look good. No complaints
Music
None as far as I am aware
Sound
None as far as I am aware. Would have been a huge step up.
Mechanics
The walking and jumping speed actually felt pretty good. Might want to move slightly faster, but it isn't bad as is if platforming isn't the goal.
Story
None as far as I am aware
Theme
The death mechanic was pretty unique. I could see a lot of puzzles here. Swapping back and forth between dimensions but using death to facilitate it is refreshing. Well done.
I think there is potential here. Get some sounds, music, and puzzles and you could have a winner.